Genetics
Student Response
Original DNA Strand:
3'-T ACCCTTTAGCCACT-5'
Transcription (base sequence of RNA):
3'-A UGGGAAAUCGGUGA-5'
Translation (amino acid sequence):
Met -- Gly -- Asn -- His -- Arg -- STOP
Mutated gene sequence one:
3'-T ACGCTTTAGCCATT-5'
Transcription (base sequence of RNA):
3'-A UGCGAAAUCGGUAA-5'
Translation (amino acid sequence):
Met -- Arg -- Asn -- His -- Arg -- STOP
Mutated gene sequence two:
3'-T AACCTTTACTAGGCACT-5'
Transcription (base sequence of RNA):
3'-A UUGGAAAUGAUCCGUGA-5'
Translation (amino acid sequence):
Ile -- Gly -- Asn -- Asp -- Pro-STOP
What is the significance of the first and last codons of an mRNA transcript?
The first codon ("Met") indicates the beginning of the transcription sequence. The last codon indicates the end of a protein sequence, which stops transcription.
Explanation:
Each protein sequence is coded with a starting and ending point, to indicate the length and type of the protein according to the sequence transcribed from the DNA template to the mRNA.
What meaning do these mRNA codons have for protein synthesis?
Each codon consists of three bases, which stand for a particular amino acid. A string of mRNA with groups of amino acids become grouped together and the combination thereof leads to...
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